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Finding the Fourth Proportional to 539,478.40, 808,526.40 and 480,035.20

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Solution

The fourth proportional to 539,478.40, 808,526.40 and 480,035.20 is: 719,437.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,478.40 : 808,526.40 = 480,035.20 : x
  2. Step 2: Convert to fraction form
    539,478.40/808,526.40 = 480,035.20/x
  3. Step 3: Cross multiply
    539,478.40x = 808,526.40 × 480,035.20
  4. Step 4: Simplify right side
    539,478.40x = 388,121,132,129.28
  5. Step 5: Solve for x
    x = 388,121,132,129.28/539,478.40
  6. Step 6: Final answer
    x = 719,437.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.